AUTHOR=Dungan Jennifer R. , Qin Xue , Hurdle Melissa , Haynes Carol S. , Hauser Elizabeth R. , Kraus William E. 

TITLE=Genome-Wide Variants Associated With Longitudinal Survival Outcomes Among Individuals With Coronary Artery Disease

JOURNAL=Frontiers in Genetics

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2021.661497

DOI=10.3389/fgene.2021.661497

ISSN=1664-8021

ABSTRACT=<sec><title>Objective</title><p>Coronary artery disease (CAD) is an age-associated condition that greatly increases the risk of mortality. The purpose of this study was to identify gene variants associated with all-cause mortality among individuals with clinically phenotyped CAD using a genome-wide screening approach.</p></sec><sec><title>Approach and Results</title><p>We performed discovery (<italic>n</italic> = 684), replication (<italic>n</italic> = 1,088), and meta-analyses (<italic>N</italic> = 1,503) for association of genomic variants with survival outcome using secondary data from White participants with CAD from two GWAS sub-studies of the Duke Catheterization Genetics Biorepository. We modeled time from catheterization to death or last follow-up (median 7.1 years, max 12 years) using Cox multivariable regression analysis. Target statistical screening thresholds were <italic>p</italic> × 10<sup>–8</sup> for the discovery phase and Bonferroni-calculated <italic>p</italic>-values for the replication (<italic>p</italic> &lt; 5.3 × 10<sup>–4</sup>) and meta-analysis (<italic>p</italic> &lt; 1.6 × 10<sup>–3</sup>) phases. Genome-wide analysis of 785,945 autosomal SNPs revealed two SNPs (rs13007553 and rs587936) that had the same direction of effect across all three phases of the analysis, with suggestive <italic>p</italic>-value association in discovery and replication and significant meta-analysis association in models adjusted for clinical covariates. The rs13007553 SNP variant, <italic>LINC01250</italic>, which resides between <italic>MYTIL</italic> and <italic>EIPR1</italic>, conferred increased risk for all-cause mortality even after controlling for clinical covariates [HR 1.47, 95% CI 1.17–1.86, <italic>p(adj)</italic> = 1.07 × 10<sup>–3</sup> (discovery), <italic>p(adj)</italic> = 0.03 (replication), <italic>p(adj)</italic> = 9.53 × 10<sup>–5</sup> (meta-analysis)]. <italic>MYT1L</italic> is involved in neuronal differentiation. <italic>TSSC1</italic> is involved in endosomal recycling and is implicated in breast cancer. The rs587936 variant annotated to <italic>DAB2IP</italic> was associated with increased survival time [HR 0.65, 95% CI 0.51–0.83, <italic>p(adj)</italic> = 4.79 × 10<sup>–4</sup> (discovery), <italic>p(adj)</italic> = 0.02 (replication), <italic>p(adj)</italic> = 2.25 × 10<sup>–5</sup> (meta-analysis)]. <italic>DAB2IP</italic> is a ras/GAP tumor suppressor gene which is highly expressed in vascular tissue. <italic>DAB2IP</italic> has multiple lines of evidence for protection against atherosclerosis.</p></sec><sec><title>Conclusion</title><p>Replicated findings identified two candidate genes for further study regarding association with survival in high-risk CAD patients: novel loci <italic>LINC01250</italic> (rs13007553) and biologically relevant candidate <italic>DAB2IP</italic> (rs587936). These candidates did not overlap with validated longevity candidate genes. Future research could further define the role of common variants in survival outcomes for people with CAD and, ultimately, improve longitudinal outcomes for these patients.</p></sec>